PDF malware analysis — malicious · 3a68918898966c8a

MALICIOUS

PDF

42.6 KB

MD5: c60be0b21b99049ffd27ec418bffeee4 SHA-1: 1c37d38da9badbee3040fa97f9e3a53816dd44a6 SHA-256: 3a68918898966c8a3eedb05bd3db19817cae638a2579c5c3d4d8b5cc08c84666

228 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded executable scripts and is flagged by ClamAV as Pdf.Exploit.Agent-36836. The ML classifier also strongly indicates maliciousness. The embedded script payload and XFA form with risky script suggest the file is designed to exploit a PDF vulnerability and download a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD7	67 bytes
`embedded_file_obj0009.bin` `e2225cee13ca18c4f3cb47dcc1c3e92615b9c9d0574a4971cea51bf3ab93acb6`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	676 bytes
`embedded_file_obj0010.bin` `8f862640c64598de2a20541f8fcbf4cb3681fe9445ef5ef6c54dfb734073a829`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x451	127 bytes
`embedded_file_obj0011.bin` `44488d9f2d12e43c819d5185622a771ee6e7061f30df20b8568c8fddcb4eefe8`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x51B	365 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0012.bin` `6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x6D3	389 bytes
`embedded_file_obj0014.bin` `268b2eccd85ce3fb08b913354744d0352eeb410ab35b5a7969432b893075b5b1`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x8A5	40626 bytes
Detection ClamAV: Pdf.Exploit.Agent-36836 Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0015.bin` `51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xA7A1	147 bytes

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